I need help bad.....this is driving me crazy??

to anyone who can help me. i am 22 i have no insurance i cant afford to go to the doctor over and over. i have never had any problems with my period it is july 7th i haven't had my period since may 10th i have had 4 pg test 1st neg 2nd pos and the last two was neg i went to the doctor to day to get i blood test and low and behold where i went they wont do blood test for pregnancy.(this place by the way is based on your income so a lot people go and i went like two yrs ago and for problems with my upper legs losing felling ETC they tried saying i was borderline diabetic or might have thyroid problems but good news neither,) now they r tring to say maybe that what it is now two.but here the thing i been tested for it and all and all my test were good.my symtoheadacheshess slight fevers stomach pains heartburn i use the bathroom more often hiccupss often erflies in stomach,and layin on my stomach or pressure to my stomach hurts.please anyone help me.